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| author | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2019-10-23 22:30:44 +0200 |
|---|---|---|
| committer | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2019-10-23 22:46:25 +0200 |
| commit | 478066c6076934ef50f9cf922cfe55dd96580d12 (patch) | |
| tree | 7acafc304087150dc2faf4746f826ae13ea5115d /src/Core | |
| parent | 74e14c070fb5bebe5258dde72e879fe7be1e43cf (diff) | |
| download | VeraCrypt-478066c6076934ef50f9cf922cfe55dd96580d12.tar.gz VeraCrypt-478066c6076934ef50f9cf922cfe55dd96580d12.zip | |
Linux/MacOSX: Add missing JitterEntropy implementation
Diffstat (limited to 'src/Core')
| -rw-r--r-- | src/Core/RandomNumberGenerator.cpp | 23 | ||||
| -rw-r--r-- | src/Core/RandomNumberGenerator.h | 2 |
2 files changed, 25 insertions, 0 deletions
diff --git a/src/Core/RandomNumberGenerator.cpp b/src/Core/RandomNumberGenerator.cpp index fffd948a..70c46492 100644 --- a/src/Core/RandomNumberGenerator.cpp +++ b/src/Core/RandomNumberGenerator.cpp @@ -46,6 +46,16 @@ namespace VeraCrypt throw_sys_sub_if (read (random, buffer, buffer.Size()) == -1 && errno != EAGAIN, L"/dev/random"); AddToPool (buffer); + + /* use JitterEntropy library to get good quality random bytes based on CPU timing jitter */ + if (JitterRngCtx) + { + ssize_t rndLen = jent_read_entropy (JitterRngCtx, (char*) buffer.Ptr(), buffer.Size()); + if (rndLen > 0) + { + AddToPool (buffer); + } + } } #endif } @@ -80,6 +90,12 @@ namespace VeraCrypt ScopeLock lock (AccessMutex); size_t bufferLen = buffer.Size(), loopLen; byte* pbBuffer = buffer.Get(); + + // Initialize JitterEntropy RNG for this call + if (0 == jent_entropy_init ()) + { + JitterRngCtx = jent_entropy_collector_alloc (1, 0); + } // Poll system for data AddSystemDataToPool (fast); @@ -127,6 +143,12 @@ namespace VeraCrypt pbBuffer += loopLen; } + + if (JitterRngCtx) + { + jent_entropy_collector_free (JitterRngCtx); + JitterRngCtx = NULL; + } } shared_ptr <Hash> RandomNumberGenerator::GetHash () @@ -232,4 +254,5 @@ namespace VeraCrypt size_t RandomNumberGenerator::ReadOffset; bool RandomNumberGenerator::Running = false; size_t RandomNumberGenerator::WriteOffset; + struct rand_data *RandomNumberGenerator::JitterRngCtx = NULL; } diff --git a/src/Core/RandomNumberGenerator.h b/src/Core/RandomNumberGenerator.h index 2d1d314a..6df31ae0 100644 --- a/src/Core/RandomNumberGenerator.h +++ b/src/Core/RandomNumberGenerator.h @@ -16,6 +16,7 @@ #include "Platform/Platform.h" #include "Volume/Hash.h" #include "Common/Random.h" +#include "Crypto/jitterentropy.h" namespace VeraCrypt { @@ -53,6 +54,7 @@ namespace VeraCrypt static size_t ReadOffset; static bool Running; static size_t WriteOffset; + static struct rand_data *JitterRngCtx; }; } |